Average Co-Inventor Count = 5.09
ph-index = 1
The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.
Company Filing History:
1. King Jim Co., Ltd. (2 from 168 patents)
2. Seiko Epson Corporation (1 from 33,464 patents)
2 patents:
1. 5745222 - Apparatus for making a stamp from an original picture
2. 5644136 - Seal making device